Machine for internally coating tubes.



menten am 21,1913.

. J'. nj. H ARBBQK. MAOHINB ron nsnmmuA comme TUBES. APPLIATIOH FILED FEB. 2,1910.

' "www SMTESFMEW .ortica 4JERVIS R. HARBECK, OF DETROIT, MICHIGAN,'ASSIGNOR, BY MESNE ASSIGNMENTS,

To DETROIT CAN JERSEY.

Losantos..l

To alt tollem t may concern: Be it known, that I, .InRvIs R. IIARBECK, a

4citizen of the United States-ofAmerica, re?v sidin at'Detroit, in the county of Wayne and tate of Michigan, have invented 4c ertain new and useful Improvements inMachines for Internally Coating Tubes, of which the following-is a specification, reference being had therein to t-he accompanying drawings.

The invention relates to the manufacture of tubes from spiral wra pings vof paper or strips of p-aper or other exibleysheet mates rial, and itis the object of the present invention to provide means-constituting a part ofthe tube-forming apparatus-for coating the inner surface of the tubes with lubricating character,

a liquid enamel. K

Heretofore, paper tubes of the character described have been internally coated during the process of manufacture by the application of the coating substance to the inner face of the paper strip before it is wound upon the mandrel. Inasmuch, however, as the usual process of forming the tube is to wind the strip by revolving it over a stationary mandrel, the coating material employed must be restricted to substances of a and any material of an adhesive nature will prevent a proper operation of the machine. With my improved construction, the tube may be enameled-with any material desired, Whether of an adhesive nature or otherwise, and without interfering in any way with the successful operation of the winding machine.

In the drawings, Figure l is a plan view machine to which my improvements are applied," Fig. 2 is an enlarged cross section through the mandrel, showing the enamel coating appliance; Fig. 3 is a longitudinal section through the mandrel, showing the parts illustrated in Fig. 2, and also the means for supplying the liquid enamel and maintaining a constant level.

The machine for winding the paper strips and forming the tubes may be of any Suitable construction of the general character described, but as shown in detail in Fig. l A is a suitable frame, upon which is mounted the stationary mandrel B. C C are paper strips fed over the tmandrel at the yproper angles to produce a spiral wrapping, one of the strips being arranged to overlap the joint of the other. D is a drive belt, which Specification of Letters Patent. Application led February 2, `1910. Serial No. 541,636.

' eration.- With 'my 'over the roll H, it'is COMPANY, 0F DETROIT, 4Il\lIICI:`lIGrAN', A CORPORATION NEW MACHINE FOR INTERNALLY COATING TUBES.

Patented Jan.` 21, 1913.

is wrapped about the mandrel and the tube 1n process of formation thereon, and serves to rotate and longitudinally advance said tube at the rate at which it is being Wound. E E are pulleys for the belt D on ,opposite sides of the mandrel, one or both of which are driven by suitable mechanism "(not shown). This apparatus, which is merely illustrated and described inits more essential and characteristiofeatures, is one which will continuously yform paper-tubes and deliver the same from the rear end of the mandrel. During movement over the mandrel', the inner surface" of the tube is'in frictional contact therewith; and, consequently, as has been already stated, any material of anadhesive' -nature tween the paper and the mandrel, particularly at the point of winding, would interfere with its successful 0pimprovement, the enamel is applied to the inner surface of the tube after the winding, and preferably at the rear end of the mandrel upon which it is wound. To this end, a chamber F is formed within the mandrel, which is filled With the enameling material, and is vapertured, as at G, for the passage of with the inner surface of the tube, I preferablyvalso employ'a roll I-I, which is arranged longitudinally ofthe mandrel in the aperture yGr and has the outer portion of its periphery arranged to contact with the inner face of the tube,- while the inner portion is immersed' in the fluid in the'chamber F. Thus, as the tube rotates and is advanced coated with the enamel, and the rotation of the roll not only distributes the liquid overthe surfacebut also reduces the frictional resistance.

To maintain the enamel in liquid form and the proper consistency, it must be heated, which is preferably accomplished by heaters, such as the steam through the chamber F. tial to renew the supply Itl is also essenof liquid and to -maintain a substantially constant level, and

this is done by extending the supply pipe I through from the forward end of the mandrel into the compartment F therein, while outside of the mandrel a suitable device is provided for maintaining a constant level,` such as the inverted container K having its f lower end immersed in a receptacle IJ.

With the construction as described, the u paper tubes delivered from the winding the enamel into contact pipes I passing means for winding i forming' mandrel having an aperture cut'.

. drel for a liquid,

apertureeccentrically to lthe of the y2'5 mandrel, andmeans for maintaining i1 1 the4 mandrel-1a constant level-of uid, whereby,

as -theroller is rotated and engages'periph erallythe top surface of the f iuid, theoluan-l tit .thereby removed therefrom .to the insi e of thetube may be kept ,uniform.'

jl. lIn a machine for rolling spiral paper. tubes, in combination with a slotted mandrel member, a roller member rotatably supmechanism are thoroughly coated -w.ith'..the. enamel upon passing over the roll I-I, and are then delivered from the machine. i

What I claim as my invention is,

l1. The combination with a mandrel and a paper stri thereon to chamber within said man and a distributing roll lo,-K cated in an aperture in the periphery of said mandrel and immersed in the liquid in said chamber for applying the liquidto the'inner. lported the slotted po face of the tube. e peripheralyengage the surface 'ofia supply 2. In a machine for rolling spiral paper :of 'fluid l,Within the mandrel, and by itisffurtubes, in combination with a hollow mantherrotationlto transferl a desired quantity drel provided with a slotted opening thereofthepsame 'to the o't'side of the mandrel, into, a roller journaled in said opening in 'thereto become adherent to fibrous material 40 fpassing thereover.

position of axial parallelism with the man A i drel adapted to transfer from within said In testimony whereof I aiiXmy signature v in presence o two witnesses.- 'f

mandrelthrough I u y JERvIs RHARBEGK;

Jform a tube, of a said opening a coating of cement and apply the same to the inner sur#A face of the tube forming on said mandrel. f

3.' In combination with a hollow vtube- Witnesses:

y W. J. BELKNAP,

.-NELLI KINsnLLA. Q

therein, a roller rotatably Ajournaled in said l 

